CMSC 140 FINAL EXAM REVIEW | QUESTIONS AND
ANSWERS | 2025/2026 UPDATE | RATED 100%
CORRECT
What does it mean to increment something? What operator is used in C++ to
do this? Answer - To increment something is to increase its value by 1. The
operator in C++ is the ++ (plus-plus) operator.
What does it mean to decrement something? What operator is used in C++ to
do this? Answer - To decrement something is to decrease its value by 1. The
operator in C++ is the -- (minus-minus) operator.
What is the difference in using a increment/decrement operator in postfix or
prefix? Answer - In prefix mode, the value is incremented before used in any
expression in the same statement. In postfix mode, the value is incremented
after used in any expression in the same statement.
What does it mean to find the modulus of something? What operator is used in
C++ to do this? Answer - To find the modulus is to find the remainder after the
division of two numbers. The operator % is used in C++.
What operator is used in C++ to represent division? Answer - The / operator is
used to represent division in C++.
, What will be the data type of the result of division between two integers?
Answer - The data type will be an integer.
What will be the result of the expression ? What will be different
compared to the expression 7.? Answer - 3 - it will be different from the
second expression, which is 3.5, since because it is integer division any
numbers after the decimal are ignored.
What will the variables 'someNum', 'anotherNum', 'lastNum', and 'aBool'
contain after the execution of the following code?
int someNum = 2, anotherNum = 3, lastNum = 1;
bool aBool;
aBool = !(++someNum > (--anotherNum * lastNum++)); Answer - someNum: 3
anotherNum: 2
lastNum: 2
abool: false
Name the three different types of loops. Answer - 1. while loop
2. do-while loop
3. for loop
For each type of loop, state if the loop is pretest or post test, and explain what
that means. Answer - 1. while loop: pretest, which means it will evaluate its
expression before the loop executes once.
2. do-while loop: post test, which means it will evaluate its expression after the
loop executes once
3. for loop: pretest, which means it will evaluate its expression before the loop
executes once.
ANSWERS | 2025/2026 UPDATE | RATED 100%
CORRECT
What does it mean to increment something? What operator is used in C++ to
do this? Answer - To increment something is to increase its value by 1. The
operator in C++ is the ++ (plus-plus) operator.
What does it mean to decrement something? What operator is used in C++ to
do this? Answer - To decrement something is to decrease its value by 1. The
operator in C++ is the -- (minus-minus) operator.
What is the difference in using a increment/decrement operator in postfix or
prefix? Answer - In prefix mode, the value is incremented before used in any
expression in the same statement. In postfix mode, the value is incremented
after used in any expression in the same statement.
What does it mean to find the modulus of something? What operator is used in
C++ to do this? Answer - To find the modulus is to find the remainder after the
division of two numbers. The operator % is used in C++.
What operator is used in C++ to represent division? Answer - The / operator is
used to represent division in C++.
, What will be the data type of the result of division between two integers?
Answer - The data type will be an integer.
What will be the result of the expression ? What will be different
compared to the expression 7.? Answer - 3 - it will be different from the
second expression, which is 3.5, since because it is integer division any
numbers after the decimal are ignored.
What will the variables 'someNum', 'anotherNum', 'lastNum', and 'aBool'
contain after the execution of the following code?
int someNum = 2, anotherNum = 3, lastNum = 1;
bool aBool;
aBool = !(++someNum > (--anotherNum * lastNum++)); Answer - someNum: 3
anotherNum: 2
lastNum: 2
abool: false
Name the three different types of loops. Answer - 1. while loop
2. do-while loop
3. for loop
For each type of loop, state if the loop is pretest or post test, and explain what
that means. Answer - 1. while loop: pretest, which means it will evaluate its
expression before the loop executes once.
2. do-while loop: post test, which means it will evaluate its expression after the
loop executes once
3. for loop: pretest, which means it will evaluate its expression before the loop
executes once.
